Melissa Vargas didnt play this tournment because of a shoulder injury. She wasnt able to recover after the World Cup. There is any punishment because she will play in Czech Republic.
As it has been said, her transfer was officially allowed by cuban federation. It was published by the FIVB.
2015 NORCECA Championship - Michoacan / Mexico - 9/25
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Thanks for the answers
Vargas is such a jewel, I hope she would have an injury-free career. 
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are there any videos of these matches? can't find anything on yt.